Overgrowth takes place in the savage world of Lugaru where rabbits, wolves and other animals are forced to use paws, claws and medieval weaponry to engage each other in battle. Combining 3rd person adventure platforming with intricate melee combat, Overgrowth achieves a unique feel. Overgrowth also benefits from Wolfire's brand new Phoenix Engine which has been built from the ground up to allow the use of cutting edge graphics, animation, and physics. Add to these exciting features Overgrowth’s realistic artificial intelligence and streamlined control system and the result is an astoundingly immersive experience.

If you have not installed Overgrowth yet you can use the SUMLauncher ( Forums.wolfire.com ) to download it!
If you already have Overgrowth installed you can use the SUMLauncher to update it to the latest alpha.
The SUMLauncher also allows you to install the Menu Mod ( Forums.wolfire.com ) which gives you another 150+ maps to try.

For Existing SUMLauncher users:

If the menu files were changed in this alpha, the menu mod will no longer work. Updating the Menu Mod (to re-enable custom maps) might take us a little while. Once we have uploaded a new version you can use the menu mod installer to update it. (And don't worry, it won't break anything if you try running the installer before we upload the new files.)
It may also take us a bit to update the Menu Mod to include any new maps that this alpha may have added.